Silver, as I understand it the Gulf Air sponsorship is a small amount with some standby tickets. If you get a JAA licence plus MCC you will stand a chance of employment with a lot of other carriers in the Gulf, with the Jordanian licence it's basically Gulf Air.
You will also find that there is no job guarantee with Gulf Air, even if you go to one of the Jordanian Schools, they will only take a percentage of the best students, they also have plans to start there own MPL Course with a 3rd party, and I would imagine those students will be employed before the CPL/IR BDB students in Jordan.
May be worth asking Gulf Air how far advanced there MPL Plans are! Mafemuk may be able to advise you on that as well.